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Methods and systems for improving frame decoding performance using known information

a frame decoding and known information technology, applied in the field of wireless communication, can solve problems such as reducing bit error rates

Inactive Publication Date: 2009-12-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method, apparatus, and computer-readable medium for decoding encoded data bits of a wireless communication transmission for a response message expected to be transmitted in response to a transmitted message. The method involves generating a hypothesis specifying a set of bit values of the encoded data bits based on a-priori information regarding the response message, and decoding the transmission by eliminating from consideration sets of decoded bits that are inconsistent with the specified bit values and selecting, as output, decoded bits that are consistent with the bit values specified by the hypothesis. The technical effect of this patent is to improve the accuracy and reliability of decoding wireless communication transmissions for response messages.

Problems solved by technology

However, with the ever increasing reliability and performance demands of wireless services, there is an ongoing need to continuously reduce bit error rates.

Method used

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  • Methods and systems for improving frame decoding performance using known information
  • Methods and systems for improving frame decoding performance using known information
  • Methods and systems for improving frame decoding performance using known information

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Embodiment Construction

[0028]The present disclosure generally provides techniques and apparatus for decoding convolutionally encoded wireless transmissions using a-priori information (API) regarding a transmission. The a-priori information may be used to effectively reduce the population of possible decoded bit streams by eliminating those that include bits that are not consistent with the a-priori information. By removing these “known wrong” paths that lead to erroneous data, decoded bit error rates may be improved in some situations.

[0029]As used herein, the term a-priori information (API) generally refers to information known beforehand, such as, information proceeding from a known or assumed cause to a necessarily related effect. As will be described in greater detail below, examples of a-priori information related to a transmission include known information bits in certain messages. Examples of such known information bits include reserved bits with values, as specified by a standard or bits that have...

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Abstract

A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of a response message expected to be transmitted in response to a previously transmitted message. Example expected response messages include clear to send (CTS) messages transmitted in response to request to send (RTS) messages and positive acknowledgement (ACK) messages transmitted in response to messages with data payloads.

Description

BACKGROUND[0001]1. Technical Field[0002]Certain embodiments of the present disclosure generally relate to wireless communications and, more particularly, to decoding wireless transmissions.[0003]2. Description of the Related Art[0004]The rapid growth in wireless communications services, such as broadband Internet access, wireless local area network access point (“hot spots”), and streaming media applications, has lead to an increasing demand for higher data rates. Advancements in multiplexing schemes, such as Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA), are important for next generation wireless communications systems. This is due to the fact that such schemes can provide many advantages including modulation efficiency, spectrum efficiency, flexibility (e.g., allowing differentiated quality of service), and strong multi-path immunity over conventional single carrier modulation schemes.[0005]OFDM and OFDMA systems often ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L27/04H04L27/06
CPCH03M13/1102H03M13/15H03M13/1515H03M13/152H04L1/1829H03M13/41H04L1/0052H04L1/0054H03M13/3994H04L27/26H04L1/16
Inventor LEE, CHUN WOOPARK, JONG HYEON
Owner QUALCOMM INC